RFR: 8309129: AArch64: guarantee(T != T2S) failed: "incorrect arrangement" after JDK-8307795

[Alexander Zvegintsev]

On Wed, 31 May 2023 10:25:07 GMT, Chang Peng <duke at openjdk.org> wrote:

> This patch fixes the issue introduced by JDK-8307795. Since addv[1] cannot support "T2S" SIMD arrangement, we should use addp[2] in this case.
> 
> TEST passed on AArch64:
> hotspot:compiler/vectorapi, jdk:jdk/incubator/vector, tier1-3
> 
> [1]: https://developer.arm.com/documentation/ddi0596/2020-12/SIMD-FP-Instructions/ADDV--Add-across-Vector-
> [2]: https://developer.arm.com/documentation/ddi0596/2020-12/SIMD-FP-Instructions/ADDP--vector---Add-Pairwise--vector--

Please note that the associated test is now in the problem list, see #14250

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PR Comment: https://git.openjdk.org/jdk/pull/14245#issuecomment-1570589862